Move N rings from A to C

可以拆解成三步驟

Move (N - 1) rings from A to B
Move ring N from A to C
Move (N - 1) rings from B to C

遞迴到 N = 1 時，輸出一行後停止增加遞迴 (N, FROM, TO 會隨遞迴狀況變動，就是要傳入的參數了)

Move ring {N} from {FROM} to {TO}